captndan Posted July 15, 2017 Posted July 15, 2017 (edited) Does anyone have a picture of the linkage on a Marvel Schebler carb? I just got it back from the rebuilder and something ain't right. For the gas line to hook up all linkage attachments and adjustments would be between the carb and the engine. Something seems to be backwards. Edited July 15, 2017 by captndan Goof (see edit history)
keiser31 Posted July 15, 2017 Posted July 15, 2017 Do you have a photo of it? Not to sound like a fool, but did you put it on 180 degrees off?
viv w Posted July 15, 2017 Posted July 15, 2017 Hi Captndan, is your vehicle a 4 cyl or 6 cyl car? and what model is it? The picture supplied by Cahartley appears to be a Model 58, 4 cyl car. I had a later Model 52 4 cyl and that had a Carter carb similar to the 27/8 Chev. Just an observation of the picture, and some constructive advice , I see the autovac suction line is joined with a short piece of plastic tubing, this will eventually dry out and come loose on the copper, leading to a lack of suction and obviously fuel, and possibly oil pressure. I would recommend replacing this pipe with no join in it, but put a coil in it, like the supply line from the autovac to the carb. The coiling of the copper tube will help to stop the pipe from cracking from vibration. I had this pipe break on me, because it did not have a coil in the pipe, after that I always carried a spare suction pipe, just in case. I would also welcome some input on the following:-, when I was rebuilding my 52 series motor a Kiwi guy advised me, to not connect the autovac suction line to the oilpump. He said if you have any leakage issues in this pipe , it can also lead to a lack of suction in the oil pump with disastrous consequences to your engine. I was advised to drill and tap the inlet manifold for the autovac suction pipe and to block off the fitting on the oil pump. I took this advice and never had any other problems. Best regards Viv. 2
captndan Posted July 16, 2017 Author Posted July 16, 2017 That's a picture I was looking for. It is a four cylinder Model 58. The carb in the picture looks the same. The fuel line lines up with the carb mounted 180 from the picture. The choke wire clamp on the carb cannot be used so a new clamp was put on the rear tappet cover bolt. The throttle linkage rod works with the backward mounting. Big problem is all attachments and adjustments are on the engine side. So I can make a new fuel line, make new throttle linkage, and some how make the choke work. The choke would be the big problem because the wire would push the butterfly the wrong direction. What to do? 1
carbking Posted July 16, 2017 Posted July 16, 2017 The carburetor in the picture appears to be a universal Zenith, not a Marvel Schebler. Generally, the universal Zenith carbs may have both the choke and throttle arms fitted on either side of the carb, and the arms are clamped onto the shafts, so the arms may be rotated to the proper fit. If the hole in the choke arm is on the wrong side of the shaft (push instead of pull), fabricate an additional bracket to bolt to the arm extending on the other side of the shaft. Think of a child's seesaw a.k.a. teeter-totter. When one kid goes up, the other kid goes down. You can use the same principal to reverse the direction of the choke linkage. Jon.
viv w Posted July 16, 2017 Posted July 16, 2017 Hi Again, If you fail to make your car run properly with the original carb and are not over concerned with originality, then fit a Ford model A Zenith carb. My original Carter was beyond repair at the time I rebuilt the car and I ran it for years with a model A carb. It ran great, spares were easy to get and I had years of trouble free motoring, clocking up over thirty thousand miles. Viv.
captndan Posted July 17, 2017 Author Posted July 17, 2017 Well, most of the problem has been solved. The carb was indeed mounted backwards. It is on the correct side now. Took awhile to make different pieces to make the choke and throttle work properly. Now to make a proper fuel line and filter. I hope it goes zooom! 2
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